Review on Denso 234 4733 Oxygen Sensor by Isaac Morales

This is the first time I've decided to go with a cheaper brand. A year later, the car threw the lower sensor code. Switched to another brand still had the code, switched to Denso still had the code. $800 later the dealer told me that the upstream I bought a year earlier had failed because it was drawing too much current causing the downstream to fail and so I had the code. Switched to Denso, the problem went away immediately. I thought I saved $20 by buying a cheaper one, but it ended up costing me an extra $850 because I still had to buy a Denso in the long run.